Description Shaped liner, narrow bore Great choice for dairies with medium production and good cow-prep procedures. Tapered Design results in lower mouthpiece vacuum Designed for a mid-range production per milking interval Operates at a lower range of milking vacuum level Best for lower system vacuum levels 11.8-12.0 in Hg (40-40.6 kPa) Designed for reliability and performance Standard 1200 cow milking rubber formula Fit BouMatic stainless steel shell Non Vented Note: BouMatic 350TL, Coburn Magnaflex and Conewango quality replacements also in stock. Replaces: BouMatic R-1 and R-1C Milkrite B1U, R1CU, B1U- Meltec 4999-1100-031 Coburn Mag302 Ezee 25086 Conewango R-1c Replacement liners for Bou-Matic (R) stainless shells (new and used shells in stock) SS Shell part number: 8517327 One Piece replacement liner for Bou-Matic. Fast clean milkout with improved mouthpiece for long life. Replaces R-1 and R-1C set of 4 Made in USA In stock options for Bou-Matic Stainless Steel shells BouMatic Original Liners (non vented listed - vented available by special order per case of 100) 8595352 Turbo 350TL Triangle Shaped liner for low vacuum level, mid level production, works well with cross breeds