Polymer Testing Instruments

Part 1 of 6

(A2LA Cert. No. 1504.01) Revised 3/9/2026 Page 1 of 5 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 ALDINGER COMPANY DBA POLYMER TESTING INSTRUMENTS, INC. 10 National Ave Fletcher, NC 28732 Larry Eisner Phone: 828 252 1326 CALIBRATION Valid To: June 30, 2027 Certificate Number: 1504.01 In recognition of the successful completion of the A2LA evaluation process (including an assessment of the organization’s compliance with R205 – A2LA’s Calibration Program Requirements), accreditation is granted to this laboratory to perform the following calibrations1, 6: I. Dimensional Parameter/Equipment Range CMC2 (±) Comments Cutting Dies Up to 8 in 580 μin Caliper Dial and Electronic Indicators 3 Up to 1 in 120μin Gage blocks Calipers3 Up to 6 in 280 μin Caliper master Micrometers3 Up to 1 in 140 μin Gage blocks

Part 2 of 6

(A2LA Cert. No. 1504.01) Revised 3/9/2026 Page 2 of 5 II. Electrical – DC/Low Frequency Parameter/Equipment Range CMC2 (±) Comments Electrical Calibration of Thermocouple Indicators3 – Generate and Measure Type J Type K Type T (-210 to 1200) °C (-200 to 1372) °C (-250 to 400) °C 0.22 °C 0.23 °C 0.23 °C Omega / Martel CL3001 Electrical Calibration of RTD Indicators 3 – Generate and Measure Pt 385, 100 Ω Pt 385, 1 kΩ Pt 3902, 100 Ω Pt 3926, 100 Ω Cu 427, 10 Ω (-200 to 800) °C (-190 to 630) °C (-200 to 630) °C (-200 to 630) °C (-100 to 260) °C 0.18 °C 0.18 °C 0.18 °C 0.18 °C 0.18 °C Omega / Martel CL3001 III. Mechanical Parameter/Equipment Range CMC2, 5 (±) Comments Force – Measure3 Force Gages and Tensile Testers Crosshead Speed (0-200) lbf (200 to 2000) lbf (2000 to 5000) lbf (0 to 20) in/min 0.078 lbf 0.25 lbf 0.14 % of full scale 0.037 in/min ASTM E4 w/ load cells Load cell comparison Calibrated scale and stopwatch Pressure – Measuring Equipment3 (0 to 300) psi (300-3000) psi 0.19 PSI 1.8 PSI Druck pressure gauges

Part 3 of 6

(A2LA Cert. No. 1504.01) Revised 3/9/2026 Page 3 of 5 Parameter/Equipment Range CMC2, 4 (±) Comments Rotational Speed3, Non-Contact (0 to 2000) rpm 2.4 rpm Tachometer Verification of Scales and Balances3 – Resolution (R): R = 0.1 g R = 0.01 g R = 0.0005 g R = 0.1 g R = 0.01 g R = 0.1 g R = 0.01 g Up to 200 g Up to 200 g Up to 200 g Up to 1000 g Up to 1000 g Up to 4000 g Up to 4000 g 58 mg 5.9 mg 0.89 mg 58 mg 6.7 mg 62 mg 23 mg Class 1 weights IV. Rubber Industry-Specific Measurements Parameter/Equipment Range CMC2 (±) Comments Extensometer3 – Gage Length Class D 0.007 in ASTM E83 w/ calibrated scale Rubber Hardness – Block Standardization: Shore A Shore C Shore D Shore M IRHD M (0 to 100) units (0 to 100) units (0 to 100) units (0 to 100) units (0 to 100) units 0.71 “A” units 0.71 “C” units 0.71 “D” units 0.71 “M” units 0.61 units Durometer