$8.88 4″ NBR Sight Glass Seal KIT 4" NBR Sight Glass Seal KIT quantity Add to cart SKU: B54BMP-SK400 Category: Sanitary Sight Glass Tags: sanitary sight glass, sight glass Additional information Additional information Weight 0.45 lbs Dimensions 7.5 × 7.5 × 7.5 in Related products 1″ 316L In-Line Sight Glass CxC $315.91 Add to cart 3″ Sight Glass – POLYCARBONATE $500.76 Add to cart 2.5″ 316L In-Line Sight Glass CxC $487.01 Add to cart 6″ Sight Glass – POLYCARBONATE $711.72 Add to cart