• Made from HNBR.• Designed for use with Freon R134a and R1234YF gas making them suitable for automotive air conditioning units and many other applications.• Contents: (Approximate Quantity) ID x Thickness; ø3 x 1, 4 x 1, 4.5 x 2, 5 x 2, 6 x 2, 6 x 2.5, 6 x 3, 7 x 2, 8 x 2mm (20 of each), 9 x 2, 10 x 2, 12 x 3, 13 x 3, 14 x 2.5, 17 x 2.5, 18 x 4, 20 x 2, 22 x 2mm (5 of each).Manufactured from HNBR. Designed for use with Freon R134a and R1234YF gas making them suitable for automotive air conditioning units and many other applications.• Made from HNBR. • Designed for use with Freon R134a and R1234YF gas making them suitable for automotive air conditioning units and many other applications. • Contents: (Approximate Quantity) ID x Thickness; ø3 x 1, 4 x 1, 4.5 x 2, 5 x 2, 6 x 2, 6 x 2.5, 6 x 3, 7 x 2, 8 x 2mm (20 of each), 9 x 2, 10 x 2, 12 x 3, 13 x 3, 14 x 2.5, 17 x 2.5, 18 x 4, 20 x 2, 22 x 2mm (5 of each). • Model No. ACOR225Technical Specification:Contents: (Approximate Quantity) ID x