Purdy Marathon 18 in roller cover — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/purdy-marathon-18-in-roller-cover/  (CC BY 4.0)
Basis: Purdy
Catalog version: 2026-10-20

Overall (mm): length 457.2, width 38.1, height 38.1
- Purdy Marathon 18 in roller cover: length 18 in (457.2 mm); core diameter 1.5 in (38.1 mm); naps 3/8, 1/2, 3/4 in. Same 1-1/2 in core as the 9 in; some 18 in frames and covers use a 2-1/4 in jumbo core instead.
- Actual published size, no printing allowance. The file is the envelope at that size.

dimension  value
length  18 in (457.2 mm)
core diameter  1.5 in (38.1 mm)
naps  3/8, 1/2, 3/4 in

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Purdy: Purdy Marathon 18 in roller cover — web — Publisher's page; dimensions are facts — https://www.purdy.com/en/products/rollers/marathon

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/purdy-marathon-18-in-roller-cover/index.json
API: https://xemstudio.com/api/geometry?object=purdy-marathon-18-in-roller-cover