SMR84ZZ Stainless Steel Bearing Shielded Miniature 4x8x3mm Longboard Bearing the N311 inner diameter is

the N311 inner diameter is 55mm

OD (outer diameter): 170mm

the N317 inner diameter is 85mm

00075 2-5/8" 0-

5mm 1mm -0

SMR84ZZ Stainless Steel Bearing Shielded Miniature 4x8x3mm Longboard Bearing the N311 inner diameter isSMR84ZZ Ball Bearings 4x8x3 Stainless Steel SMR84ZZ Ball Bearing Stainless Steel Ball Bearings, this is a popular size that could be used in many miniature applications that requires this ID 4mm x OD 8mm and 3mm wide. Bearings are made from stainless steel Bearing has 2 Metal Shield to protect the bearing from dust or any possible contamination. SMR84ZZ Double Shielded Ball Bearings Size: 4mm x 8mm x 3mm Deep groove ball bearings Material: Stainless