Shopping Cart (0) Quotes (0) Express Ordering All Categories > Piping > Air-Pro® HDPE Compressed Air Piping System > Socket Backing Rings > Advanced Search Advanced Search in Socket Backing Rings Unit of Measure Imperial Metric Both Specifications Size (in) No Preference 1 1/2 1-1/2 1-1/4 2 3 3/4 4 Size (mm) No Preference 110 20 25 32 40 50 63 90 Dimensions Dimension D (in) No Preference 3.740 4.016 4.488 5.118 5.236 6.378 7.638 9.016 Dimension k (in) No Preference 2.380 2.750 3.120 3.500 3.880 4.750 6.000 7.500 Dimension D2 (in) 0.630 0.787 Dimension d6 (in) No Preference 1.102 1.339 1.654 2.008 2.441 3.071 4.370 5.236 Dimension b (in) 0.472 0.630 0.709 Clear Cancel Advanced Search