Manufactured from HNBR. Designed for use with Freon R134a and R1234YF gas making them suitable for automotive air conditioning units and many other applications. Features & Benefits: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. ACOR225 Specifications: Model No ACOR225 Brand: Sealey 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) Nett Weight: 0.11kg