CHEMSOLUTE Universal pH-indicator paper, pH 1-14, 5m x 7mm, Refill pack with 3 rolls Back Catalog number: 2814-3ROLL Availability: In the manufacturer's stock Price on request - + Recommended SE220 Double junction pH electrode SE220 Price on request MA991B/1 Combined glass pH electrode MA991B/1 Price on request MA9305 Pack of 100 x 1.4V batteries. Price on request